Apache Velocity is an open-source Java-based template engine that allows developers to generate dynamic content by merging Java objects with templates. It provides a simple, flexible, and powerful way to separate business logic from presentation, making it suitable for web applications, source code generation, reports, and other text-based outputs.

Features of Apache Velocity:

• Clean separation of Java logic and presentation through template files.
• Lightweight and fast, easy to embed into any Java application.
• Supports Velocity Template Language (VTL) with conditionals, loops, and macros.
• Integrates seamlessly with Java objects via context variables.
• Useful for web page rendering, code generation, configuration files, and reports.
• Open-source project maintained by the Apache Software Foundation.

To check the installed working of Velocity Content, run these commands in your environment:

$ sudo su
$ sudo apt update
$ cd /opt/velocity-engine-2.4.1
$ java -cp .:/opt/velocity-engine-2.4.1/velocity-engine-core/target/velocity-engine-core-2.4.1.jar:/opt/slf4j-api-2.0.9.jar:/opt/slf4j-simple-2.0.9.jar:/opt/commons-lang3-3.12.0.jar VelocityTest

Disclaimer: Apache Velocity is released under the Apache 2.0 License and is maintained by the Apache Software Foundation. Users are responsible for ensuring correct usage in their applications. Always refer to the official Apache Velocity documentation for the most accurate and up-to-date information.